From 0ecf89aae327d545af6e10defd2315c97874cbd5 Mon Sep 17 00:00:00 2001
From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Wed, 29 Sep 2004 21:55:52 +0000
Subject: level triggered IRQ fix (Steve Wormley)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1078 c046a42c-6fe2-441c-8c8c-71466251a162
---
 hw/i8259.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'hw')

diff --git a/hw/i8259.c b/hw/i8259.c
index c21f0d3060..221506b28f 100644
--- a/hw/i8259.c
+++ b/hw/i8259.c
@@ -188,7 +188,9 @@ static inline void pic_intack(PicState *s, int irq)
     } else {
         s->isr |= (1 << irq);
     }
-    s->irr &= ~(1 << irq);
+    /* We don't clear a level sensitive interrupt here */
+    if (!(s->elcr & (1 << irq)))
+        s->irr &= ~(1 << irq);
 }
 
 int cpu_get_pic_interrupt(CPUState *env)
-- 
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